Higher yielding improved matching reference circuit especially applicable for high speed mixed signal applications and phase locked loops and charge pumps

A phase locked loop having a charge pump is described. The charge pump relies on close matching of FETs (Field Effect Transistor) electrical parameters to FETs in a current reference circuit. To achieve close matching of FET electrical performance, FEOL (Front End Of Line), comprising all FET shapes...

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Bibliographische Detailangaben
Hauptverfasser:	Unterborn, Erik, Strom, James, Borkenhagen, John, Kesselring, Grant P, Wu, Ann Chen
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS RESONATORS
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Beschreibung
Zusammenfassung:	A phase locked loop having a charge pump is described. The charge pump relies on close matching of FETs (Field Effect Transistor) electrical parameters to FETs in a current reference circuit. To achieve close matching of FET electrical performance, FEOL (Front End Of Line), comprising all FET shapes, of the current pump is identical in shapes and layout to the current reference circuit. BEOL (Back End Of Line) differs between the charge pump and the current reference circuit. The charge pump and the current reference circuit are arranged in a row. A shield circuit having FEOL shapes and layout identical to the current pump may be placed at each end of the row.